Boeing Stratofortress the old girl has been rebuilt, and re-engine updated with new electronics over the decades. The USAF expects the to continue service into 2040

New View of stealthy drone X-47B

This stealthy unmanned aerial vehicle (UAV) is the size of a fighter jet, and will be taking off and landing from the deck of an aircraft carrier. This is an unusual overhead view of the scary looking plane, which was mistaken for a UFO at least once.